Sound-reproducer



R. W. CHARLTON.

SOUND REPRODUCER.

APPLICATION FILED JAN. 10, 1920.

1,378,835, 1 I Patented May 24, 1921.

2 SHEETS-SHEET I.

177 1 6/710/ EWf/Mr/Zwr R. W. CHARLTON. 'souwo REPRODUCER.

APPLICATION FILED JAN.10, I920. 1 ,378,835. Patented May 24, 1921.

2 SHEETS-SHEET 2.

UNITED STATES ROBERT w. ciiAitL'roN, or PINEVILLE, LOUISIANA, ASSIGNOR or 0l.\TE-HALF To PATENT" OFFICE.

HARRY H. JORDAN, OF RAPIDES PARISH, LOUISIANA.

SOUND-REPRODUCERQ Specification of Letters Patent.

Application filed January ,10, 1920.'- Serial No. 350,587.

To all whom it may concern:

Be it known that I, ROBERT W. CHARLTON, a citizen of the United States, residin at Pineville, in the county of Rapides and S tate of Louisiana, have invented certain new and useful Improvements in Sound-Reproduce'rs, of which the following is a specification.

The present'invention appertains to im.- provements in sound reproducers, and the object thereof is to provide a novel con one type, and substantially vertical theretowhen playing the other type, but in contradistinction my invention comprehends theperformance of the dual function without changing the angular relation of the diaphragm to the record.

'Broadly the invention comprises a special stylus bar connected as usual to the diaphragm at one end and having pivotal connection with the peripher of the sound-box intermediate its ends. however, the reproducer consists of a duplex stylus bar or lever arrangement embodying a common connectionwith the diaphragm but separate and independent pivot mountings, the one stylus carrying part to take care of proper transmission of lateral mo tions while the other similarly, the vertical motions imparted thereto by the sound record.

A further object in view is to providea movable connection for the sound-box enabling either of the stylus bars to be'brought two stylus holding means and to further .embody'with this type of sound-box a means for sustaining the weight of the box during shown in Fig. 1.

ore specifically,

' record for the purpose of eliminating unnecessary wear. F or a full understanding of the present invention, reference is to-be had to the following description arid the accompanying drawings inwhich 5 ducer arm having my invention app ied thereto.

Fig. 2 is a'vertical section View taken on I the line 2-2 of Fig. 1'.

Fig. 3 1s a similar sectional view taken on the line3-3 of Fig. 1.

Fi 4 is a transverse sectional view on the line 4-4 of Fig. 2.

Fig. 5 is a fragmentary sectional view on the. line 5-5 of Fig. 4; and, I

Fig. 6 is a detailedsectional view of the double socket of one of the stylus parts.

Fig. 7 is a two plan view of thedevice as scription, and on the several figures of the drawings, similar parts arereferred to by' like reference characters.

Referring to the drawings 1 designates a tone arm supported in the usual manner uponthe body 2 of the instrument, said arm being composed of the vertical rotating sections 3 and the horizontal section4 which moves in a horizontal plane during the playing operation, but is capable of vertical movement having in view the joint indicated at 5. At the outer end of the arm is disposed the sound-box 6 having the diaphragm 7 and the duplex stylus bar 8 which forms the special feature of this invention. At this point it is well to note that I preferably employ means to sustain the weight -of the sound-box and the horizontal section of the reproducer arm hereinbefore mentioned, and for this purpose I mount upon ears 9 the shank of a springlO which at an intermediate point is provided with a series of the ear 12. This spring permits free vertical movement of the section 4 when adjusting the sound-box for playing. purposes but is of sufficient strength or tension to supthe parts hereinbefore mentioned.

' the coaction' of the same with the sound I Referring now to the construction of the Patented May 24, 1921.

v Figure 1,1s a side elevation of a re rothe verticalsection 3 of the arm, in space port the greater portion of the weight of I 75 Throughout the following detailed desound-box, extending rearwardly therefrom is a short nipple or neck 12 which is suitably provided with recesses or notches 13 in which a locking member 14: is adapted to engage, as clearly shown in Fig. 5, said looking member or spring being attached to the.

tone arm. The sound-box body is of the usual type and to the diaphragm 7 thereof the duplex stylus bar 8 is connected in the usual manner. This bar consists of the bar part 15 and a second bar part 16. These parts, as will be observed in F ig.- 1, extend radially from the center of the sound-box and have a common connection with the diaphragm as indicated at 8'. The angle of divergence of the bar parts 15 and 16 is such that it will permit the cooperation of either one of the parts with the sound record while the other is disposed in inoperativerelation with respect to said record and I do not wish to be confined to any particular angular relation so long as this adjustment is capable of accomplishment.

Specifically describing the characteristics of the duplex stylus bar, that member de' signated 15 is straight as clearly apparent from consideration of Fig. 2, being pivotwhile the stylus part 16 is ally mounted intermediate its length between the space ears 17 on the periphery of the sound-box, by means of the adjustable pivot pins 18. At the outer end this part carries the stylus 19 in a socket and the said stylus is held by means of the clamping screw 20.

Passing now to the element or bar part 16, this will be observed in F 'ig.'3 to be of angular form pivoted between the ears 17 upon the pivot pins 18 arranged to coact with the elbow portion of the bar member. The outer end of this bar part is provided with a double socket, as will be clear from Fig. 6

of the drawing, that is to say it is provided with a vertical bore,21 and a second bore intersecting the same as indicated at 22, the stylus received in either bore being held by means of the clamping screw 23. The purpose of so constructing'this bar part is to permit different types of styli to be used with different types of records-capable of being played upon this particular instrument. For example, in playing those vertical wave records, I use diamond point or sapphire ball styli in the verticalbore when the record to be reproduced is the. Edison or Pathe, while in playing Paramount, Rex, Aeolian-Vocalian and like records of the vertical wave construction I employ the steel stylus in the inclined bore 22.

'It will probably'have become apparent from the foregoing description that the stylus part 15 is designed to be used with those records which are of the lateral wave type,

used when playwave type. To playing position ing records of the vertical bring either of these into it is only necessary to revolve the soundbox about its axial center, as indicated clearly in Fig. 1 of the drawings, wherein the bar part 15 is in cooperative relation or playing position with respect to the record while-the bar part 16 is in inoperative position, and when the box is shifted so that the bar part 15 is in the dotted line position of said figure the relation of the parts to the record is reversed. It should be understood that the stylus socket bores in the part 16 are so arranged with relationto each other that a stylus may be disposed in either and brought into playing position upon the record without interference with the stylus in the other bar part 15.

Having thus described my invention what I claim as new is:

1. In combination, a reproducer arm, a sound-box comprising a diaphragm supported thereon, and a plurality of angularly related stylus-holding means carried by said sound-box for playing sound records difi'ering in type as regards'direction of undulation of the grooves therein, said sound-box being adjustable to bring any stylus-holding means.

2. In combination, a reproducer arm, a sound-box comprising a diaphragm supported thereon, and a plurality of angularly related stylus-holding means carried by said sound-box for playing sound records difi'ering in type as regards direction of undulation of the grooves therein, said sound-box being adjustable to bring any stylus-holding means into operative relation to the ty e of record which it is desired to play wit out substantially changing the angular relation of the diaphragm to the plane of the record, one of said stylus-holding means having provision for holding the stylus either substantially vertical to the plane of the record or at an inclination thereto.

3. In combination, a reproducer arm movable in a horizontal plane during playing in spaced relation to each other and ada ted to be brought into and out of playln position with respect to the record upon a justment of said box about its axls afore- Said.

4, In combination, a reproducer arm having a vertical section revoluble about its axis in movement of the reproducer in pla ing and a horizontal section adapted to e vertically moved with respect to the vertical section, a sound box carried by said horizontal section, and a spring support for partially sustaining the weight of the horizontal section and its sound box, said support comprising a spring member having a shank fixedly supported in a vertical position upon the vertical section of the reproducer arm and a horizontal extension connected with the horizontal portion of the reproducer arm, the support being provided with a se ries of coils at an intermediate point for providing sufficient tension to substantially counter-balance the horizontal section of the arm.

5. In combination, a reproducer arm having a vertical section and a horizontal section movable vertically with respect to the first mentioned section, a sound box carried by said horizontal section, spaced lugs arranged upon the vertical section, and a spring member includin a vertical shank disposed in the spaced lugs aforesaid for support, a spring coil intermediate its length and a horizontal extension projecting from said coil and connected with thehorizontal section of the reproducer arm.

6. The combination with a tone arm, of a sound-box pivotally mounted thereon and comprising a diaphragm, a duplex stylus bar for playing either laterally or vertically undulating sound records, each element of said bar having independent connection with the sound-box, one of said elements being formed for transmission of vibrations to the diaphragm by lateral motion of said stylus and the other by vertical motion, said box being movable without changing the angular relation of the diaphragm to the record to bring either of its bar elements into operative playing position with respect to said record.

7. The combination with a support, of a sound-box pivotally connected thereto comprising a diaphragm, a stylus bar consisting of spaced stylus carrying members having a common connection with the diaphragm at one end and each an independent pivot connection with the box intermediateits length, one of. said members being a straight bar for transmission of lateral motion to the diaphragm and the other of said members being angular in shape for trans mission of vertical motion to the diaphragm without changing the angular relation of the diaphragm to the record.

In testimony whereof I afiix my signature.

ROBERT w. CHARLTON. 

